Where are you browsing from today?

USA flag

US
EU / UK

Ethical Clothing
USA flag

Sustainable Cotton Underwear

Shop for cotton underwear from the top ethical and sustainable clothing brands in the United States

286 Products | Page 1 of 6 | On Sale Selected

Page 1 of 6 | On Sale Selected

Sort By:

Commissions may be paid to Ethical Clothing when purchasing items with our partner brands.
Organic Cotton High Rise Legging
Ten Tree
Organic Cotton High Rise Legging
  • 24.00
  • 30.00
Pre-Loved Organic Pima Cotton Wrap Front Bodysuit ♻️
Hello Jackalo
Pre-Loved Organic Pima Cotton Wrap Front Bodysuit ♻️
  • 12.00
  • 38.00
Tasty Scallop Trunks - Outerworn
Outerknown
Tasty Scallop Trunks - Outerworn
  • 74.00
  • 128.00
All Time Scallop Trunks
Outerknown
All Time Scallop Trunks
  • 39.00
  • 98.00
Organic Cotton Scoop Bralette in Wheat
Subset
Organic Cotton Scoop Bralette in Wheat
  • 24.00
  • 48.00
Pax Legging
Groceries Apparel
Pax Legging
  • 73.50
  • 98.00
Organic Cotton Women's Underwear Starter Set
Knickey
Organic Cotton Women's Underwear Starter Set
  • 85.00
  • 100.00
The Long-Sleeve Supima® Square-Neck Bodysuit | White | Bikini
Everlane
The Long-Sleeve Supima® Square-Neck Bodysuit | White | Bikini
  • 14.00
  • 45.00
Organic Cotton High-Rise Thong in Petal
Subset
Organic Cotton High-Rise Thong in Petal
  • 10.00
  • 20.00
Organic Cotton Keyhole Soft Bra in Garnet
Knickey
Organic Cotton Keyhole Soft Bra in Garnet
  • 31.00
  • 62.00
Organic Cotton Mid-Rise Shortie in Meridian
Knickey
Organic Cotton Mid-Rise Shortie in Meridian
  • 10.00
  • 20.00
The Supima® Boxer Brief | Uniform | Heathered Grey
Everlane
The Supima® Boxer Brief | Uniform | Heathered Grey
  • 7.00
  • 24.00
Organic Cotton Scoop Bralette in Cloud Nine
Subset
Organic Cotton Scoop Bralette in Cloud Nine
  • 24.00
  • 48.00
Stretch Legging
Soor Ploom
Stretch Legging
  • 51.00
  • 64.00
Organic Cotton Low-Rise Thong in Petal
Knickey
Organic Cotton Low-Rise Thong in Petal
  • 10.00
  • 20.00
Simplicité Bralette - Black and Ivory
Ode
Simplicité Bralette - Black and Ivory
  • 48.00
  • 68.90
Organic Cotton Top Drawer Swap
Subset
Organic Cotton Top Drawer Swap
  • 200.00
  • 224.00
The Form Funnel-Neck Bodysuit | Black
Everlane
The Form Funnel-Neck Bodysuit | Black
  • 17.00
  • 58.00
Momo Midi Legging 19"
Groceries Apparel
Momo Midi Legging 19"
  • 73.50
  • 98.00
Organic Cotton Triangle Soft Bra in Meridian
Knickey
Organic Cotton Triangle Soft Bra in Meridian
  • 31.00
  • 62.00
Leggings - Corals Blue
Winter Water Factory
Leggings - Corals Blue
  • 22.40
  • 32.00
Organic Cotton Top Drawer Swap in Carbon
Subset
Organic Cotton Top Drawer Swap in Carbon
  • 297.00
  • 322.00
EcoKnit™ Ribbed Leggings
United By Blue
EcoKnit™ Ribbed Leggings
  • 17.00
  • 68.00
Baby Leggings - Moles Blue
Winter Water Factory
Baby Leggings - Moles Blue
  • 16.80
  • 28.00
Favorite Bodysuit
Soor Ploom
Favorite Bodysuit
  • 37.00
  • 62.00
Organic Cotton Long Sleeve Bodysuit - Geometric Moon
Tonle
Organic Cotton Long Sleeve Bodysuit - Geometric Moon
  • 14.00
  • 24.00
The Long-Sleeve Supima® Square-Neck Bodysuit | Goji Berry | Thong
Everlane
The Long-Sleeve Supima® Square-Neck Bodysuit | Goji Berry | Thong
  • 25.00
  • 45.00
Organic Cotton Mid-Rise Shortie in Petal
Subset
Organic Cotton Mid-Rise Shortie in Petal
  • 10.00
  • 20.00
Kids' Organic Cotton Purple Leggings
Crann
Kids' Organic Cotton Purple Leggings
  • 21.00
  • 28.00
Organic Cotton Keyhole Soft Bra in Garnet
Subset
Organic Cotton Keyhole Soft Bra in Garnet
  • 31.00
  • 62.00
Kids Organic Cotton Cropped Leggings 2 Pack - FINAL SALE
Mightly
Kids Organic Cotton Cropped Leggings 2 Pack - FINAL SALE
  • 11.95
  • 29.95
Organic Cotton Women's Underwear Starter Set in Quartz
Subset
Organic Cotton Women's Underwear Starter Set in Quartz
  • 85.00
  • 100.00
Men's Full Week - 7 Organic Cotton Breather Briefs
Kent
Men's Full Week - 7 Organic Cotton Breather Briefs
  • 205.00
  • 238.00
Organic Cotton Tank Bralette in Carbon
Subset
Organic Cotton Tank Bralette in Carbon
  • 15.00
  • 48.00
The Cotton High-Rise Hipster | Dark Sage
Everlane
The Cotton High-Rise Hipster | Dark Sage
  • 8.00
  • 15.00
Baby Leggings - Submarines Blue & Orange
Winter Water Factory
Baby Leggings - Submarines Blue & Orange
  • 19.60
  • 28.00
Organic Cotton Mother's Day Gift Set in Quartz
Subset
Organic Cotton Mother's Day Gift Set in Quartz
  • 297.00
  • 322.00
The Long-Sleeve Supima® Square-Neck Bodysuit | Lapis Blue | Bikini
Everlane
The Long-Sleeve Supima® Square-Neck Bodysuit | Lapis Blue | Bikini
  • 23.00
  • 45.00
Organic Cotton Mid-Rise Hipster in Aurora
Subset
Organic Cotton Mid-Rise Hipster in Aurora
  • 10.00
  • 20.00
Organic Cotton Scoop Bralette in Lunar
Knickey
Organic Cotton Scoop Bralette in Lunar
  • 24.00
  • 48.00
Organic Cotton Scoop Bralette in Wheat
Knickey
Organic Cotton Scoop Bralette in Wheat
  • 24.00
  • 48.00
Shooting Star Leggings - FINAL SALE
Mightly
Shooting Star Leggings - FINAL SALE
  • 10.80
  • 27.00
Organic Cotton Scoop Bralette in Carbon
Knickey
Organic Cotton Scoop Bralette in Carbon
  • 24.00
  • 48.00
The Surf Trunk in Sage
Taylor Stitch
The Surf Trunk in Sage
  • 39.00
  • 88.00
Organic Cotton Low-Rise Thong Mystery 3-Pack
Knickey
Organic Cotton Low-Rise Thong Mystery 3-Pack
  • 20.00
  • 60.00
Organic Cotton Mid-Rise Brief Mystery 3-Pack
Knickey
Organic Cotton Mid-Rise Brief Mystery 3-Pack
  • 20.00
  • 60.00
Hipster - Cassiopée Lace - Gold Sunflower
Ode
Hipster - Cassiopée Lace - Gold Sunflower
  • 17.40
  • 31.30
Organic Cotton Low-Rise Thong in Lunar
Knickey
Organic Cotton Low-Rise Thong in Lunar
  • 10.00
  • 20.00

Filter By

Bras (73)
Leggings (55)
Lingerie (8)
Thongs (36)
Baby (12)
Kids (42)
Men (21)
Unisex (3)
Women (208)
Underwear (286)
All
Cotton (84)
Organic-Cotton (202)
All
Agolde (2)
Another Tomorrow (3)
Brook There (26)
Christy Dawn (29)
Crann (3)
Everlane (69)
Fair Indigo (5)
Figge (4)
Go Gently Nation (20)
Groceries Apparel (13)
Happy Earth (34)
Harvest And Mill (4)
Harvest & Mill (4)
Hello Jackalo (1)
Jungmaven (3)
Kent (24)
Knickey (158)
Known Supply (33)
Loup Charmant (36)
Lovetrust (1)
Mara Hoffman (1)
Mate (48)
Miakoda (1)
Mightly (86)
Namuk (1)
Nu Swim (4)
Ode (60)
Outerknown (2)
Pansy (28)
Printfresh (18)
Soor Ploom (13)
Subset (161)
Taylor Stitch (4)
Ten Tree (4)
Tonle (6)
United By Blue (8)
Vitamin A (1)
Wama Underwear (7)
Winter Water Factory (164)
Yala (2)
Sales only
Ethical Clothing Logo Be the first to know when North America's top ethical brands are on sale, sign up to our newsletter here